Microsoft released the latest version of Microsoft .NET Framework, version 4.5.2. Microsoft says
The Microsoft .NET Framework 4.5.2 is a highly compatible, in-place update to the Microsoft .NET Framework 4, Microsoft .NET Framework 4.5 and Microsoft .NET Framework 4.5.1
if you want an offline installer you can get it from this link. There are some known issues for the 4.5.2 related to PowerShell, SqlClient and Visual studio 2012. Read more about the known issues here
Microsoft .NET Framework Repair Tool
Do you face any issues while installing a new .NET framework version, or updating an existing one ? Microsoft .NET Framework Repair Tool may help you to fix the problem. This tool can solve the frequently occurring issues while installing or updating .NET Framework
.NET Framework Cleanup Tool
If you want to remove some old .NEt framework versions you can use the .NET Framework Cleanup Tool. This tool can remove all the related entries to a framework version you want to remove.
Supports
.NET Framework - All Versions
.NET Framework - All Versions (Tablet PC and Media Center)
.NET Framework - All Versions (Windows Server 2003)
.NET Framework - All Versions (Windows Vista and Windows Server 2008)
.NET Framework - All Versions (Windows 7)
.NET Framework 1.0
.NET Framework 1.1
.NET Framework 2.0
.NET Framework 3.0
.NET Framework 3.5
.NET Framework 4
.NET Framework 4.5
.NET Framework 4.5.1
Read more about this product from here